Slump-retaining water reducing agent mother liquor and preparation method thereof

Abstract

The invention discloses a slump-retaining water reducer mother liquor and a preparation method thereof, and the slump-retaining water reducer comprises the following raw materials: alkylene alkenyl polyoxyethylene ether, hydrogen peroxide, an acrylate polymerization initiator mixture, an acrylate copolymerization initiation solution, a lipid-containing gel substance, a sodium hydroxide solution and deionized water. The lipid-containing gel substance can enhance the water-retaining property of the water reducer and reduce the water loss of concrete in the stirring and transportation processes, so that the stability of the concrete is improved, sedimentation and layering are prevented, the lipid-containing gel can react with free chloride ions in water to generate a water-insoluble gel substance, the permeability of the concrete is reduced, and the water-retaining property of the concrete is improved. The water reducing agent is favorable for improving the durability of concrete and reducing permeation of moisture and harmful chemical substances, so that the service life of the concrete is prolonged, the water reducing efficiency of the water reducing agent is improved, good workability of the concrete is allowed to be kept under the condition of lower dosage, meanwhile, the flowability and plasticity of the concrete are improved, and pouring and forming are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of water reducing agents, in particular to a collapse-preserving water reducing agent mother solution and a preparation method thereof. Background Art

[0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc. After cement is mixed with water, the cement slurry forms a flocculated structure due to the molecular attraction of cement particles, so that 10% to 30% of the mixing water is wrapped in the cement particles and cannot participate in free flow and lubrication, thus affecting the fluidity of the concrete mixture. When water reducer is added, the water reducer molecules can be directional adsorbed on the surface of cement particles, so that the surface of cement particles carries the same charge (usually negative charge), forming an electrostatic repulsion effect, which promotes the mutual dispersion of cement particles, destroys the flocculation structure, and releases part of the wrapped water. The hydrophilic group in the water reducer has a strong polarity, so the water reducer adsorption film on the surface of cement particles can form a stable solvated water film with water molecules. This water film has a good lubricating effect and can effectively reduce the sliding resistance between cement particles, thereby further improving the fluidity of concrete. The hydrophilic polyether side chain in the water reducer structure extends in the aqueous solution, thereby forming a hydrophilic three-dimensional adsorption layer with a certain thickness on the surface of the adsorbed cement particles. When the cement particles are close, the adsorption layers begin to overlap, that is, a steric hindrance is generated between the cement particles. The more overlaps, the greater the steric repulsion, and the greater the hindrance to the cohesion between cement particles, so that the slump of the concrete is maintained well.

[0003] Chinese patent announcement number CN113980201B discloses a collapse-preserving water-reducing agent mother liquor and a preparation method thereof, wherein an allyl polyether macromonomer and an ester macromonomer are copolymerized, and a cross-linking monomer and a collapse-preserving functional monomer containing a large number of ester groups are introduced at the same time, so that the synthesized water-reducing agent molecule is a micro-cross-linking structure, and the micro-cross-linking structure makes the ester group α position have a great steric hindrance, so that the ester group hydrolysis efficiency is low and the dispersion ability is maintained for a long time. The cross-linking structure, the ester group and the ether group jointly improve the collapse-preserving performance of the collapse-preserving water-reducing agent mother liquor. The above technology requires that a photoinitiator, a liquid A and a chain transfer agent be added dropwise to a first mixed liquid under an ultraviolet light irradiation environment of 5-20°C. The reaction conditions are harsh, and a water-reducing agent product with high yield and high stability is urgently needed. For this reason, the present invention provides a collapse-preserving water-reducing agent mother liquor and a preparation method thereof for solving the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the traditional water reducing agent has limited anti-caries effect, and provides a collapse-preserving water reducing agent mother solution and a preparation method thereof, thereby solving the above problem.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A slump-retaining water-reducing agent mother solution and a preparation method thereof, wherein the slump-retaining water-reducing agent is composed of the following raw materials: alkylene polyoxyethylene ether, hydrogen peroxide, acrylate polymerization initiator mixture, acrylate copolymerization initiator solution, lipid-containing gel material, sodium hydroxide solution and deionized water;

[0007] Among them, the molecular structure of alkylene polyoxyethylene ether contains polyoxyethylene chains, which can effectively reduce the surface tension of water, thereby improving the fluidity of concrete mixtures. Alkylene polyoxyethylene ether can be adsorbed on the surface of cement particles, disperse cement particles through steric hindrance, reduce aggregation between particles, and improve the fluidity and plasticity of concrete. In concrete, alkylene polyoxyethylene ether can improve the stability of the mixture and prevent stratification or sedimentation during mixing and transportation.

[0008] Among them, hydrogen peroxide, as an oxidant, can participate in chemical reactions and promote certain polymerization reactions or activation of initiators. In the preparation process, hydrogen peroxide can be used for disinfection to ensure the hygiene and safety of water reducer products. In addition, hydrogen peroxide will produce oxygen and water when decomposing. Its decomposition process can affect the pH value of the mixture, thereby affecting the acidity and alkalinity of the concrete.

[0009] Among them, sodium hydroxide solution can be used to adjust the pH value of concrete water reducer to achieve the required alkaline environment, which helps to stabilize the water reducer and can also participate in the polymerization reaction to promote the formation of polymer chains;

[0010] Among them, lipid-containing gel substances can enhance the water retention of water reducing agents, reduce the water loss of concrete during mixing and transportation, and thus improve the stability of concrete, prevent sedimentation and stratification, and lipid-containing gel substances can react with free chloride ions in water to generate water-insoluble gel substances, reduce the permeability of concrete, help improve the durability of concrete, reduce the penetration of water and harmful chemicals, thereby extending the service life of concrete, improve the water-reducing efficiency of water reducing agents, and allow the good workability of concrete to be maintained at a lower dosage, while improving its fluidity and plasticity, facilitating pouring and molding, and helping to fill the capillary holes and fine cracks in concrete, thereby improving the overall density of concrete, enhancing the overall performance of concrete, and improving the antifreeze performance and chemical erosion resistance, so that concrete can better adapt to harsh environments and corrosive conditions;

[0011] Among them, deionized water reduces the dissolved solids in water, improves the purity of water, and helps to avoid the negative effects of impure substances on the performance of water reducers. In concrete, water reducers prepared with deionized water can improve the workability and strength of concrete.

[0012] The method for preparing the collapse-retaining water-reducing agent mother solution comprises the following steps:

[0013] S1. Add alkylene polyoxyethylene ether and deionized water into a reaction kettle and stir until the alkylene polyoxyethylene ether is completely dissolved, and continue to add hydrogen peroxide and stir for 10 minutes;

[0014] S2, prepare the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution respectively, and inject them into the corresponding dropping tanks respectively;

[0015] S3, adjusting the temperature of the reaction kettle to 20°C, and evenly adding the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution into the reaction kettle at the same time and stirring;

[0016] S4, maintaining the temperature of the reactor at 20°C, adding the lipid-containing gel substance into the reactor, continuing to stir for 30 minutes and then letting it stand;

[0017] S5. After keeping warm for 1 hour, add sodium hydroxide solution and deionized water into the reactor and continue stirring for 10 minutes.

[0018] Furthermore, the slump-retaining water-reducing agent is composed of the following raw materials in parts by weight:

[0019] 30-35 parts of alkylene polyoxyethylene ether, 0.2-0.3 parts of hydrogen peroxide, 9-12 parts of acrylate polymerization initiator mixture, 5-6 parts of acrylate copolymerization initiator solution, 5-10 parts of lipid-containing gel material, 1-3 parts of sodium hydroxide solution, and 45-50 parts of deionized water.

[0020] Furthermore, the acrylate polymerization initiator mixture is a mixture of acrylic acid, hydroxyethyl acrylate and deionized water, and the weight ratio of acrylic acid, hydroxyethyl acrylate and deionized water is 12:31:66. Acrylic acid has good polymerization performance and can form a high molecular weight polymer. In the water reducer, it can increase the molecular weight of the water reducer, enhance its adsorption capacity on the surface of cement particles, and improve the water reduction effect. Hydroxyethyl acrylate can increase the hydrophilicity of the polymer, improve the solubility and dispersibility of the water reducer in water, and help to disperse the cement particles more evenly, thereby improving the fluidity of the concrete.

[0021] Furthermore, the acrylate copolymerization initiator solution is a mixture of bleaching powder, mercaptopropionic acid and deionized water, and the weight ratio of the bleaching powder, mercaptopropionic acid and deionized water is 1:1.5:50. The bleaching powder, as an oxidant, can react with the thiol group in the mercaptopropionic acid to generate free radicals, thereby more effectively initiating the polymerization reaction. Mercaptopropionic acid is sensitive to oxidants. Mixing in advance and properly controlling the conditions can reduce the oxidation of the thiol group and maintain the stability of the initiator.

[0022] Furthermore, the concentration of the sodium hydroxide solution is 30%.

[0023] Furthermore, in step S1, the weight ratio of alkylene polyoxyethylene ether, hydrogen peroxide and deionized water is 32:0.25:23.

[0024] Furthermore, in step S3, the dripping time ratio of the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution is 5:6.

[0025] Furthermore, in step S5, the weight ratio of the sodium hydroxide solution to the deionized water is 2:26.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention discloses a slump-retaining water-reducing agent mother solution and a preparation method thereof. The lipid-containing gel substance can enhance the water retention of the water-reducing agent, reduce the water loss of concrete during mixing and transportation, thereby improving the stability of the concrete and preventing sedimentation and stratification. The lipid-containing gel can react with free chloride ions in water to generate a water-insoluble gel substance, reduce the permeability of the concrete, help improve the durability of the concrete, reduce the penetration of water and harmful chemicals, thereby extending the service life of the concrete, improve the water-reducing efficiency of the water-reducing agent, allow the good workability of the concrete to be maintained at a lower dosage, and improve its fluidity and plasticity, facilitate pouring and molding, and help fill the capillary holes and fine cracks in the concrete, thereby improving the overall density of the concrete, enhancing the overall performance of the concrete, and improving the antifreeze performance and chemical erosion resistance, so that the concrete can better adapt to harsh environments and corrosive conditions;

[0028] 2. The present invention discloses a mother solution of a slump-retaining water-reducing agent and a preparation method thereof. Acrylic acid has good polymerization performance and can form a high-molecular-weight polymer. In the water-reducing agent, it can increase the molecular weight of the water-reducing agent, thereby enhancing its adsorption capacity on the surface of cement particles and improving the water-reducing effect. Hydroxyethyl acrylate can increase the hydrophilicity of the polymer, improve the solubility and dispersibility of the water-reducing agent in water, and help to more evenly disperse the cement particles, thereby improving the fluidity of the concrete. The bleaching block, as an oxidant, can react with the thiol group in mercaptopropionic acid to generate free radicals, thereby more effectively initiating a polymerization reaction. Mercaptopropionic acid is sensitive to oxidants. Mixing in advance and properly controlling conditions can reduce the oxidation of the thiol group and maintain the stability of the initiator. By premixing the two, the pH value and ionic strength of the reaction medium can be better controlled, providing optimal conditions for the polymerization reaction. The mixed initiator solution helps to form polymers with specific structures and functions during the polymerization process. These polymers can have better dispersibility and adsorption, thereby improving the water-reducing effect and slump-retaining performance of the water-reducing agent.

[0029] 3. The present invention discloses a slump-retaining water-reducing agent mother liquor and a preparation method thereof. The lipid gel can increase the viscosity of the system, help stabilize the emulsion or suspension formed during the polymerization reaction, prevent the aggregation or sedimentation of polymer particles, and can also participate in the start-up and regulation of the polymerization reaction as an initiator or chain transfer agent. The lipid gel can affect the activity of the monomer through physical encapsulation or chemical action, thereby regulating the polymerization reaction rate, reducing the hydrolysis efficiency of the monomer, and prolonging the dispersion characteristics. The lipid gel helps to obtain a polymer with expected performance by regulating the reaction rate and improving the molecular weight distribution of the polymer. It can also improve the flexibility, heat resistance and chemical stability of the polymer by introducing new functional groups or changing the microstructure. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: A slump-retaining water-reducing agent mother solution and a preparation method thereof, wherein the slump-retaining water-reducing agent is composed of the following raw materials in parts by weight: 322 g of alkylene polyoxyethylene ether, 2.5 g of hydrogen peroxide, 54.5 g of acrylate polymerization initiator mixture, 21.25 g of acrylate copolymerization initiator solution, 50 g of lipid-containing gel material, 20 g of sodium hydroxide solution, and 494 g of deionized water;

[0032] Wherein, the acrylate polymerization initiator mixture is a mixture of acrylic acid, hydroxyethyl acrylate and deionized water, and the weights of the acrylic acid, hydroxyethyl acrylate and deionized water are 6g, 15.5g and 33g respectively;

[0033] The acrylate copolymerization initiation solution is a mixture of bleaching powder, mercaptopropionic acid and deionized water, and the weights of the bleaching powder, mercaptopropionic acid and deionized water are 0.5 g, 0.75 g and 25 g respectively.

[0034] The method for preparing the collapse-retaining water-reducing agent mother solution comprises the following steps:

[0035] S1, 322g of alkylene polyoxyethylene ether and 230g of deionized water were added into a reactor and stirred until the alkylene polyoxyethylene ether was completely dissolved, and 2.5g of hydrogen peroxide was added and stirred for 10min;

[0036] S2, prepare 54.5g of acrylate polymerization initiator mixture and 21.25g of acrylate copolymerization initiator solution respectively, and inject them into corresponding dropping tanks respectively;

[0037] S3, adjusting the temperature of the reaction kettle to 20°C, and evenly adding the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution into the reaction kettle at the same time and stirring;

[0038] S4. After keeping warm for 1 hour, add 20g of sodium hydroxide solution and 260g of deionized water into the reactor and continue stirring for 10 minutes.

[0039] Furthermore, the concentration of the sodium hydroxide solution is 30%.

[0040] Furthermore, in step S3, the dripping time of the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution is 25 minutes and 30 minutes respectively.

[0041] Embodiment 2:

[0042] Compared with Example 1, this example has a different raw material ratio in the preparation process of the water reducing agent, and the rest is the same as Example 1.

[0043] A slump-retaining water-reducing agent mother liquor and a preparation method thereof, wherein the slump-retaining water-reducing agent is composed of the following raw materials in parts by weight: 322 g of alkylene polyoxyethylene ether, 2.5 g of hydrogen peroxide, 109 g of an acrylate polymerization initiator mixture, 52.5 g of an acrylate copolymerization initiator solution, 50 g of a lipid-containing gel material, 20 g of a sodium hydroxide solution, and 494 g of deionized water;

[0044] Wherein, the acrylate polymerization initiator mixture is a mixture of acrylic acid, hydroxyethyl acrylate and deionized water, and the weights of the acrylic acid, hydroxyethyl acrylate and deionized water are 12g, 31g and 66g respectively;

[0045] The acrylate copolymerization initiation solution is a mixture of bleaching powder, mercaptopropionic acid and deionized water, and the weights of the bleaching powder, mercaptopropionic acid and deionized water are 1 g, 1.5 g and 50 g respectively.

[0046] The method for preparing the collapse-retaining water-reducing agent mother solution comprises the following steps:

[0047] S1, 322g of alkylene polyoxyethylene ether and 230g of deionized water were added into a reactor and stirred until the alkylene polyoxyethylene ether was completely dissolved, and 2.5g of hydrogen peroxide was added and stirred for 10min;

[0048] S2, prepare 109g of acrylate polymerization initiator mixture and 52.5g of acrylate copolymerization initiator solution respectively, and inject them into corresponding dropping tanks respectively;

[0049] S3, adjusting the temperature of the reaction kettle to 20°C, and evenly adding the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution into the reaction kettle at the same time and stirring;

[0050] S4. After keeping warm for 1 hour, add 20g of sodium hydroxide solution and 260g of deionized water into the reactor and continue stirring for 10 minutes.

[0051] Furthermore, the concentration of the sodium hydroxide solution is 30%.

[0052] Furthermore, in step S3, the dripping time of the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution is 50 minutes and 60 minutes respectively.

[0053] Embodiment 3:

[0054] Compared with Example 1, this example has different raw material components and proportions in the preparation process of the water reducing agent, and the rest is the same as Example 1.

[0055] A slump-retaining water-reducing agent mother liquor and a preparation method thereof, wherein the slump-retaining water-reducing agent is composed of the following raw materials in parts by weight: 322 g of alkylene polyoxyethylene ether, 2.5 g of hydrogen peroxide, 109 g of an acrylate polymerization initiator mixture, 52.5 g of an acrylate copolymerization initiator solution, 50 g of a lipid-containing gel material, 20 g of a sodium hydroxide solution, and 494 g of deionized water;

[0056] Wherein, the acrylate polymerization initiator mixture is a mixture of acrylic acid, hydroxyethyl acrylate and deionized water, and the weights of the acrylic acid, hydroxyethyl acrylate and deionized water are 12g, 31g and 66g respectively;

[0057] The acrylate copolymerization initiation solution is a mixture of bleaching powder, mercaptopropionic acid and deionized water, and the weights of the bleaching powder, mercaptopropionic acid and deionized water are 1 g, 1.5 g and 50 g respectively.

[0058] The method for preparing the collapse-retaining water-reducing agent mother solution comprises the following steps:

[0059] S1, 322g of alkylene polyoxyethylene ether and 230g of deionized water were added into a reactor and stirred until the alkylene polyoxyethylene ether was completely dissolved, and 2.5g of hydrogen peroxide was added and stirred for 10min;

[0060] S2, prepare 109g of acrylate polymerization initiator mixture and 52.5g of acrylate copolymerization initiator solution respectively, and inject them into corresponding dropping tanks respectively;

[0061] S3, adjusting the temperature of the reaction kettle to 20°C, and evenly adding the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution into the reaction kettle at the same time and stirring;

[0062] S4, maintaining the temperature of the reactor at 20°C, adding 50 g of lipid-containing gel material into the reactor, continuing to stir for 30 minutes and then letting it stand;

[0063] S5. After keeping warm for 1 hour, add 20g of sodium hydroxide solution and 260g of deionized water into the reactor and continue stirring for 10 minutes.

[0064] Furthermore, the concentration of the sodium hydroxide solution is 30%.

[0065] Furthermore, in step S3, the dripping time of the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution is 50 minutes and 60 minutes respectively.

[0066] Embodiment 4:

[0067] Compared with Example 1, this embodiment has different raw material components and proportions in the preparation process of the water reducing agent, and the rest is the same as Example 1.

[0068] A slump-retaining water-reducing agent mother liquor and a preparation method thereof, wherein the slump-retaining water-reducing agent is composed of the following raw materials in parts by weight: 322 g of alkylene polyoxyethylene ether, 2.5 g of hydrogen peroxide, 109 g of an acrylate polymerization initiator mixture, 52.5 g of an acrylate copolymerization initiator solution, 50 g of a lipid-containing gel material, 20 g of a sodium hydroxide solution, and 494 g of deionized water;

[0069] Wherein, the acrylate polymerization initiator mixture is a mixture of acrylic acid, hydroxyethyl acrylate and deionized water, and the weights of the acrylic acid, hydroxyethyl acrylate and deionized water are 6g, 15.5g and 33g respectively;

[0070] The acrylate copolymerization initiation solution is a mixture of bleaching powder, mercaptopropionic acid and deionized water, and the weights of the bleaching powder, mercaptopropionic acid and deionized water are 0.5 g, 0.75 g and 25 g respectively.

[0071] The method for preparing the collapse-retaining water-reducing agent mother solution comprises the following steps:

[0072] S1, 322g of alkylene polyoxyethylene ether and 230g of deionized water were added into a reactor and stirred until the alkylene polyoxyethylene ether was completely dissolved, and 2.5g of hydrogen peroxide was added and stirred for 10min;

[0073] S2, prepare 54.5g of acrylate polymerization initiator mixture and 21.25g of acrylate copolymerization initiator solution respectively, and inject them into corresponding dropping tanks respectively;

[0074] S3, adjusting the temperature of the reaction kettle to 20°C, and evenly adding the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution into the reaction kettle at the same time and stirring;

[0075] S4. Maintain the temperature of the reactor at 20°C, add 50g of lipid-containing gel material into the reactor, continue stirring for 30 minutes and then let stand

[0076] S5. After keeping warm for 1 hour, add 20g of sodium hydroxide solution and 260g of deionized water into the reactor and continue stirring for 10 minutes.

[0077] Furthermore, the concentration of the sodium hydroxide solution is 30%.

[0078] Furthermore, in step S3, the dripping time of the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution is 25 minutes and 30 minutes respectively.

[0079] The water reducing agents prepared in Examples 1 to 4 were used as the experimental group for the experiment, as follows:

[0080] In accordance with GB / T50080-2016 "Standard for Test Methods for Performance of Ordinary Concrete Mixtures", the water-reducing agent mother solution prepared in Examples 1-4 above was added to the concrete, and the initial slump, 1h slump, 2h slump, and 3h slump of the concrete were measured, and the water-cement ratio was fixed at 0.48.

[0081] The concrete mix ratio is: water: 175Kg, cement (Southern Cement P.052.5R): 360Kg, machine-made sand (mud content 5%): 790Kg, stone: 1060Kg.

[0082] The experimental results are shown in the following figure:

[0083]

[0084] Test conclusion: Example 4 and Example 3 are significantly better than Example 1 and Example 2 in terms of collapse retention. Example 3 is more stable than Example 4, which proves the collapse retention effect of lipid-containing gel substances.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slump-retaining water-reducing agent mother solution and a preparation method thereof, characterized in that: The slump-retaining water-reducing agent is composed of the following raw materials: alkylene polyoxyethylene ether, hydrogen peroxide, acrylate polymerization initiator mixture, acrylate copolymerization initiator solution, lipid-containing gel material, sodium hydroxide solution and deionized water; The method for preparing the collapse-retaining water-reducing agent mother solution comprises the following steps: S1. Add alkylene polyoxyethylene ether and deionized water into a reaction kettle and stir until the alkylene polyoxyethylene ether is completely dissolved, and continue to add hydrogen peroxide and stir for 10 minutes; S2, prepare the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution respectively, and inject them into the corresponding dropping tanks respectively; S3, adjusting the temperature of the reaction kettle to 20°C, and evenly adding the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution into the reaction kettle at the same time and stirring; S4, maintaining the temperature of the reactor at 20°C, adding the lipid-containing gel substance into the reactor, continuing to stir for 30 minutes and then letting it stand; S5. After keeping warm for 1 hour, add sodium hydroxide solution and deionized water into the reactor and continue stirring for 10 minutes.

2. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: The slump-retaining water-reducing agent is composed of the following raw materials in parts by weight: 30-35 parts of alkylene polyoxyethylene ether, 0.2-0.3 parts of hydrogen peroxide, 9-12 parts of acrylate polymerization initiator mixture, 5-6 parts of acrylate copolymerization initiator solution, 5-10 parts of lipid-containing gel material, 1-3 parts of sodium hydroxide solution, and 45-50 parts of deionized water.

3. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: The acrylate polymerization initiator mixture is a mixture of acrylic acid, hydroxyethyl acrylate and deionized water, and the weight ratio of the acrylic acid, hydroxyethyl acrylate and deionized water is 12:31:

66.

4. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: The acrylate copolymerization initiation solution is a mixture of bleaching powder, mercaptopropionic acid and deionized water, and the weight ratio of the bleaching powder, mercaptopropionic acid and deionized water is 1:1.5:

50.

5. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: The concentration of the sodium hydroxide solution is 30%.

6. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: In the step S1, the weight ratio of alkylene polyoxyethylene ether, hydrogen peroxide and deionized water is 32:0.25:

23.

7. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: In the step S3, the dripping time ratio of the acrylate polymerization initiator mixture and the acrylate copolymerization initiator solution is 5:

6.

8. A slump-retaining water-reducing agent mother solution and a preparation method thereof according to claim 1, characterized in that: The weight ratio of the sodium hydroxide solution to the deionized water in step S5 is 2:26.

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